WesWorld

A cheap multi-role torpedo boat. Has a secondary role as a minelayer.


Type 1, Yugoslavia Torpedo Boat laid down 1937

Displacement:
600 t light; 625 t standard; 657 t normal; 683 t full load

Dimensions: Length overall / water x beam x draught
300.00 ft / 300.00 ft x 27.00 ft x 7.10 ft (normal load)
91.44 m / 91.44 m x 8.23 m x 2.16 m

Armament:
3 - 4.33" / 110 mm guns in single mounts, 40.59lbs / 18.41kg shells, 1937 Model
Breech loading guns in deck mounts
on centreline ends, majority aft, 1 raised mount aft
4 - 1.85" / 47.0 mm guns (2x2 guns), 3.17lbs / 1.44kg shells, 1937 Model
Dual purpose guns in deck mounts
on side, all amidships
Weight of broadside 134 lbs / 61 kg
Shells per gun, main battery: 150
6 - 23.6" / 599.44 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,746 shp / 12,493 Kw = 32.00 kts
Range 1,350nm at 15.00 kts
Bunker at max displacement = 58 tons

Complement:
64 - 84

Cost:
£0.416 million / $1.664 million

Distribution of weights at normal displacement:
Armament: 17 tons, 2.6 %
Machinery: 294 tons, 44.7 %
Hull, fittings & equipment: 239 tons, 36.4 %
Fuel, ammunition & stores: 57 tons, 8.7 %
Miscellaneous weights: 50 tons, 7.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
240 lbs / 109 Kg = 5.9 x 4.3 " / 110 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 1.0 ft / 0.3 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 0.93

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 11.11 : 1
'Natural speed' for length: 19.86 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.00 ft / 4.57 m
- Forecastle (30 %): 13.00 ft / 3.96 m (11.00 ft / 3.35 m aft of break)
- Mid (50 %): 11.00 ft / 3.35 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 11.84 ft / 3.61 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 172.2 %
- Above water (accommodation/working, high = better): 60.2 %
Waterplane Area: 5,174 Square feet or 481 Square metres
Displacement factor (Displacement / loading): 59 %
Structure weight / hull surface area: 25 lbs/sq ft or 122 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.75
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

On a boat of this size, I'd stick with 21" torpedoes, unless you're using a short 600mm of some sort, to keep the top weight down.

Do those weapons really fit onto a ship this size?

The problem is that Yugoslavia doesn't have any torpedoes between 18" and 23.6", and the 18" torpedoes are just too small. The torpedoes should fit. The smilarly sized Mexican ex-O'Brians, carry 8x21" torpedoes and 3x5" guns.

Bump

These are the TBs that where under construction by Yugoslavia.

Quoted

Originally posted by Desertfox
Bump

These are the TBs that where under construction by Yugoslavia.

Thank you; duly noted.